"Underworld - Rez" patch

Underworld are an UK electronic group, and principal name under which duo Karl Hyde and Rick Smith have recorded together since 1980. Rez is a hit they had in 1993.




 * vco 1 and vco 2 are tuned in unison to a low register root note e.g. C3 and vco 2 is hard synced to vco 1 square.
 * The 1v/Oct pitch sequence for voice 1 is fed to vco 1, the gate out to EG 1 with settings of A:0 D:0 S:max R:0
 * The 1v/Oct pitch sequence for voice 2 is fed to vco 2, the gate out to EG 2 with settings of A:0 D:medium S:0 R:short
 * optional velocities can be fed as an aux cv to the resonant LPF along with some noise fed sample & hold to provide random/pseudo-random timbre shaping. likewise, the velocity cv's can also be inverted and fed to a resonance input to add more hollowness on the lower pitched notes.
 * the waveshaper can be replaced by a distortion module or even just by overdriving the VCAs.
 * the EG 2 and VCA 2 block can be replaced by an LPG or even the entire EGs/VCAs and filter block by an LPG or more separate ones to give a diferent character to the sound - though some waveshaping/pwm/distortion/wavefolding/overdrive before the LPG might be necessary to get the best results from this arrangement.

Note
The notes used for voice 2 harmonics are the 5th through 10th notes of the harmonic series - these can be programmed as ratios of 1.2, 1.6666..7, 1.42857.., 1.125, and 1.1111... to get the correct harmonics from a synth with fixed fm routing but ratio/mod index control.

If you wanna play around with the fun of the harmonic series and don't know any math/music theory, try finding the first ten notes C3, C4, G4, C5, E5, G5, Bb5, C6, D6, E6 in the harmonic series. just combining these notes with a C2 or C3 drone can provide hours of twin oscillator fun, let alone the complexities of using both VCOs with these notes in combinations...